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fomenos
3 years ago
13

Which of the following statements best explains how elements can be distinguished from molecules and compounds?

Biology
1 answer:
Aleks [24]3 years ago
3 0

Answer: Option (b) is the correct answer.

Explanation:

A compound is defined as the substance in which different elements are chemically combined together in a fixed ratio by mass.

For example, MgSO_{4} is a compound and elements are present in 1:4 ratio.

A compound can be divided into its constituent or simpler substances.

On the other hand, a molecule is defined as a specie that contains same type of elements.

For example, O_{2} is an oxygen molecule.

And, an element is defined as a substance which is made up of only one type of atoms. An element can never be broken down into its constituent particles.

For example, a piece of lithium metal will contain atoms of lithium only.

Thus, we can conclude that the statement elements are made up of one kind of atom best explains how elements can be distinguished from molecules and compounds.

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. How many electrons are in the n = 2 shell of the oxygen atom before bonding? eight electrons 2. What is the maximum number of
balandron [24]

Answers

1. 8 electrons

2. 10 electrons

3. 10 electrons

4. 8 from the oxygen atom and 1 from each of the 2 hydrogen atoms

5. 4 hydrogen bonds

Explanation

The atomic number of oxygen is 8 thus it has a total of 8 electrons. When writing the electron configuration for the oxygen, the first n shell requires two electrons to complete the 1st orbital. The fact that 1s holds a maximum of 2 electrons the next 2 electrons of oxygen goes to 2s orbital. The 2s orbital takes a maximum of two electrons and the remaining 4 electrons occupy the 2p orbital. The configuration formed will be 1s² 2s² 2p4 .The maximum number of electrons in the second shell is 2n²=2×2² =8 from the formula 2n² (the maximum number of electrons in a shell). The total number of electrons in the second shell is 2(in s orbital) +4 (in p orbital) =6.The number of unpaired electrons is 8-6=2

A water molecule has four hydrogen bonds, because it is made up of two hydrogen atoms and an oxygen atom. A water molecule has 10 protons and 10 electrons thus it is neutral. In the water molecule there is formation of covalent bonds where oxygen atom and hydrogen atoms share electrons though the sharing is not equal. In the covalent bond, the oxygen atoms attract electrons more than the hydrogen atoms.


7 0
3 years ago
Read 2 more answers
What are the good and bad benefits of biomolecules​
velikii [3]

Answer:

Biomolecules. Biomolecules are all biological materials exclusive of cells and structural proteins when they are used as the “natural biomaterials” themselves. Biomolecules include proteins, lipids, etc., and can serve various functions like providing structural integrity to the tissue-engineered constructs.

Explanation:

4 0
2 years ago
How to remember the word equation for photosynthesis?
Vanyuwa [196]
Search this on youtube : <span>Photosynthesis Equation Song - Biology Lesson
</span>
haha this might help. 
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3 years ago
Brainliest:Both the euglena and paramecium seen here have___?
forsale [732]

Answer:

projections that help them move

Explanation:

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However what is common in both of these are projections that help them move . Paramecium have projections called cilia around the whole body while Euglena has a whip like flagella which helps it to move.

Hope it help!

8 0
3 years ago
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Which pair of terms describes studies that give specific information about movement, behavior, and composition of ancient specie
Softa [21]

Answer: A because before used to be fossils.

Not shure just double check but from my side its A

Explanation:

7 0
2 years ago
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